Automatic carriage-reversing mechanism for typewriters



Sept, 23 1924.

' wwzz J. M. CARINO AUTOMATIC CARRIAGE REVERSING MECHANISM FOR TYPEWRITERS Filed March '7, 1923 2 Sheets-Sheet l wwsari mu-llllllllllll 1 11mm 1E 45 1|||||1|||| llllll lllllllllllll Sept. 23 1924. 1,509,228

. J. M. CARINO AUTOMATIC CARRIAGE REVERSTNG MECHANISM FOR TYPEWR ITERS Filed March 7, 1923 2 Sheets-Sheet 2 Patented Sept. 23, 1924.

JOSE M. CARING, OF WASHINGTON, DISTRICT OF COLUMBIA.

AUTOMATIC CARRIAGE-REVERSING MECHANISM FOR TYPEWRITERS.

7 Application filed March 7, 1923.

T 0 all whom it may concern Be it known that Jose M. CAnINo, a citizen ofthe United States, residing at Washington, in the District of Columbia, has invented certain new and useful Improvements in Automatic Carriage-Reversing Mechanism for Typewriters, of which the following is a specification.

The main purpose of my invention is the provision of an automatic reversing 1nech anism for typewriters that may be applied to practical y all types oftypewriters with which I am now familiar, the invention being characterized by its extreme simplicity of construction and high efficiency of operation.

A further object of my invention is the provision of a arriage reversing mechanism wherein when a typewriter carriage has reached its limit of movement in one direction the same is automatically retracted to its initial position, the invention being further of such a nature wherein the carriage may be reversed at any position that may be desired.

Having the above and other objects in view as the nature of the invention is better understood the same consists in the combination and arrangement of parts hereinafter more fully described,

In thedrawings wherein like reference characters indicate corresponding parts throughout the several views:

Figure 1 is a plan view of a typewriter platten together with the combined platten actuating and carriage reversing lever disclosing in combination therewith my improved reversing mechanism;

Figures 2 and 3 are fragmentary plan views of the opposite ends of the typewriter tabulation bar disclosing more clearly thecarriage actuating contact members of my reversing mechanism; and

Figure 4 is a diagrammatic view of the wiring system.

Referring to the drawings in detail. 5

designates the typewriter platten; 6 the com bined platten control and carriage reversing lever; 7 the tabulation bar: and 8 the typewriter carriage, all of these elements being found upon practically all types of typewriters with which I am familiar.

Mounted at a convenient point upon the typewriter frame is a relatively small electric motor 9, the front end of the armature shaft 10 carrying a pulley 11. Secured at Serial No. 623,353.

one end to this pulley is a metal band 12, the opposite end thereof bemg secured as at 13 to the said platten control and carriage reversing bar 6, it being noted through a consideration of Figure 1 that this band 12 is passed over a loose pulley 14. mounted at a convenient point upon the typewriter frame.

Referring particularly to Figure :2, there is shown disposed upon one end of the tabulation bar 7 of the typewriter a normally closed switch designated in general A. This switch embodies a fibre strip 15 carrying a stationary contact arm 16 and a swinging contact arm 17, this last mentioned co'ntact being in normal engagement with the said contact 16 through the instrumentality of a leaf spring 18. w

'ith particular reference to Figure 3, the tabulation bar 7 of the typewriter is shown as being provided with a normally open switch designated in general by B. This switch likewise constitutes the provision of a fiber strip 19 upon which is secured a stationary contact 20 and a movable contact 21, the said movable contact being in the form of a spring arm and normally disengaged or separated from the said stationary contact A diagrammatic view of the circuit is shown in Figure 4. the positive pole of a storage battery (not shown) has'connected therewith a wire a, the end of this wire being formed with a contact 7). The negative pole c of the said storage battery is electrically connected through the instrumentality of a wire 0' to the stationary contact 16 of the normally closed switch A. the opposite movable contact 17 of this switch being electrically connected asat (K with one terminal of the said motor 9. The opposite terminal of this motor 9 is electrically connected with an armature (2. The stationary contact 30 of the normally open switch It has electrical connection at f with the said wire a from the positive pole of the storage battery. it being noted that the movable contact 21 of this switch is in normally open circuit through the wire r with an electron'iagnet II. this magnet being obviously positioned directly beneath the said armature c, the wire o being further provided with a contact in spaced relation to said contact I). W'ithin the line 9 is a hand switch (7, the movable contact 23 thereof being preferably the usual spacer bar of the typewriter. the stationary contact 24 being in a position to be engaged by the 'said contact 23. The winding of the electroma net it has electrical connection through the instrumentality of a resistance coil is with the said wire d between the mova- -ble contact 17 of the switch A and the said terminal of the motor 9, it being noted in this figure that there is provided w1th1n the line of circuit between the wirea from the storage battery and the said wire al a condenser p for the purpose of elimlnatmg sparking between the contact points of the switches A, B and C. The stationary terminal Z of a hand switch 22 is electrically connected at m with the wire 9 between the switch C and said magnet,-the movable contact or finger piece n of this switch being electrically connected at 0 with the said wire a, between the opposite pole of the battery and the said stationary contact I).

In view of the above description it will be at once understood that the circuit to the motor 9 is normally open which will permit the unwinding of the band 12 from the pulley 11 as the carriage 8 is being moved to the left of the typewriter. As soon as the carriage reaches the limit of movement in this direction the switch B will be closed; pressure upon the spacing bar 23 of the typewriter completing the circuit to the magnet h for attracting the armature e for consequently bridging the contact points I) and This armature completes the circuit to the motor 9 for consequently winding the band 12 upon the pulley 11 for thereby reversing the movement of the said carriage 8. As soon as the carriage reaches its limit of movement in this reverse direction the same will strike the movable contact 17 of the nor mally closed switch A which will eifectively' circuit between the storage battery and magnet h which will attract the armature e for bridging the contacts I) and i for thereby completing the circuit to said motor 9 for winding the band 12 upon the pulley 11.

In view of the above description it is believed by me that it will be at once apparent that I have provided a highly effective automatic means for reversing the movement of a typewriter carriage and although I have herein shown and described the preferred embodiment of the present invention it is nevertheless to be understood that minor changes may be made therein without de parting from the spirit and scope of the inventionvas claimed.

Having thus described my invention, what I claim as new and desire to secure by Let.- ters Patent is:

In a typewriting machine, a normally closed switch mounted upon the frame of the machine, a normally open switch mounted upon the frame of the machine, said switches being located in the path of movement of the carriage of the machine and at the end of the path of movement, an electric motor, means operatively connecting the electric motor with the carriage reversing bar and the line spacing bar of the machine, an electric circuit connected with the normally closed switch and with the motor, and connected with one of the terminals of the normally open switch, a. condenser connected with the electric circuit at the opposite side of the normally closed switch, an open conductor connected. with the opposite side of the normally open switch, means adapted to be manually operated for closing said conductor, a magnet connected with the first mentioned circuit and the open conductor, resistance means interposed between the magnet and the electric circuit, and an armature controlled by the magnet and movable to connect the electric circuit with the said 'open circuit.

In testimony whereof I affix my signature.

JOSE M. CARING. 

